Radeon HD 6670 (OEM) 1GB vs Radeon R9 M390X

Intro

Compare all that to the Radeon R9 M390X, which uses a 28 nm design. AMD has clocked the core speed at 723 MHz. The GDDR5 RAM works at a speed of 1250 MHz on this card. It features 2048 SPUs along with 128 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM) 1GB		63 Watts
Radeon R9 M390X		125 Watts
	Difference: 62 Watts (98%)

Memory Bandwidth

In theory, the Radeon R9 M390X will be 150% faster than the Radeon HD 6670 (OEM) 1GB overall, due to its higher data rate. (explain)

Radeon R9 M390X		160000 MB/sec
Radeon HD 6670 (OEM) 1GB		64000 MB/sec
	Difference: 96000 (150%)

Texel Rate

The Radeon R9 M390X should be a lot (more or less 382%) better at anisotropic filtering than the Radeon HD 6670 (OEM) 1GB. (explain)

Radeon R9 M390X		92544 Mtexels/sec
Radeon HD 6670 (OEM) 1GB		19200 Mtexels/sec
	Difference: 73344 (382%)

Pixel Rate

The Radeon R9 M390X should be a lot (about 262%) faster with regards to AA than the Radeon HD 6670 (OEM) 1GB, and also capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon R9 M390X		23136 Mpixels/sec
Radeon HD 6670 (OEM) 1GB		6400 Mpixels/sec
	Difference: 16736 (262%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the maximum amount of data (in units of megabytes per second) that can be transferred past the external memory interface within a second. The number is calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.